/*
    timer.c
    Copyright (C) 2011  Jiabo <jiabo2011@gmail.com>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/

#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <sys/wait.h>

#define TIMER_INTERVAL 500 * 1000

extern void host_alarm_handler(int host_signum);
int start_timer(void)
{
	struct sigaction act;
	struct itimerval itv;
	int err;

	/* timer signal */
	sigfillset(&act.sa_mask);
	act.sa_flags = 0;
	act.sa_handler = host_alarm_handler;

	sigaction(SIGALRM, &act, NULL);

	itv.it_interval.tv_sec = 1;
	itv.it_interval.tv_usec = 0;
	itv.it_value.tv_sec = 1;
	itv.it_value.tv_usec = 0;

	err = setitimer(ITIMER_REAL, &itv, NULL);
	if (err)
		return -1;

	return 0;
}

void stop_timer(void)
{
	struct itimerval itv;

	memset(&itv, 0, sizeof(itv));
	setitimer(ITIMER_REAL, &itv, NULL);
}

